Bone Breaker

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails.  On a hit, the target must make a Strength saving throw against your spell save DC.  On a failed save, the creature takes additional bludgeoning damage equal to your Strength modifier (minimum of one) and cannot take reactions until the end of your next turn.

At Higher Levels.  At 5 level, the melee attack deals an extra 1d8 bludgeoning damage.  The damage increases again by 1d8 at 11 level and 17 level.